code: def lcb_score(v, i=1.0):
      m = mean(v)
      stat = (1 + np.sqrt(np.log(3.0 + i))) / np.sqrt(len(v))
      return m + 0.1 * stat
  
file_path: nevergrad/docs/instrumentations_examples.py
imports: import numpy
  import sys
  from joblib import Parallel, delayed
  from collections import defaultdict
  import nevergrad
  import signal
label_desc: Use image node_id 3 for calling a global function with example usage: lcb_score(v, i) and returns: unknown